Pertanyaan

Photosynthesis is the process used by plants to make their own food. Or in more complex terms, it is the conversion of light energy into chemical energy by plants. This chemical energy is used by plants for growth and nourishment. Photo means light and synthesis means putting together in Greek. When humans cook food some essential things are required including fire, water and vegetables, etc. Similarly, to make their food, plants also need some essential factors including light, water, nutrients, soil, etc. Plants get light from the sun, water from the ground, and carbon dioxide from the air. All of these factors including air, water, carbon dioxide, and sunlight together help plants turn out their own food. Plants have tubes called xylem located in the stems through which the water from the ground is sucked into the leaves. This system is similar to humans sucking liquids through a straw. The xylem is spread throughout the different parts of the plant including stems, branches, and all the way up to the leaves. The xylem transport vital nutrients to the entire plant Xylems in the plant is like the blood vessels in the human body that act as an important means of transportation of water and nutrients. Leaves on the plant have pores very similar to the pores on the skin of our body. These pores are called stomata. These stomata are responsible for the exchange of gases, the carbon dioxide present in the air, which is responsible for photosynthesis enters the plant through these stomata. Oxygen also comes out through these stomata. Leaves have important cells called mesophyll cells. These cells contain a green color component called chloroplasts. This chloroplast is responsible for the green color of plants and leaves. Once the carbon dioxide and the water reach the chloroplasts in the presence of sunlight, the process of photosynthesis starts to take place. The following reaction takes place in the leaves of the plant during photosynthesis. Carbon dioxide plus water in the presence of light energy result in oxygen plus glucose or carbohydrates. The products forms are glucose and oxygen. Carbohydrates which are a form of glucose are synthesized from carbon dioxide and water. Glucose is used by plants for their growth. Some of the glucose is used immediately and extra glucose which is not used is stored in the form of starch in the leaves. Some amount of this extra glucose is also stored in the roots of the plants. This extra glucose is used to perform photosynthesis when there is no sunlight. Oxygen is given out into the air through the stomata in the process of photosynthesis. The oxygen that is released is used by a human being to breathe during their respiration process. "Underwater photosynthesis takes place at a slower pace than the normal photosynthesis" What is the main idea of the fifth paragraph?

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